package gen.tools.delivery;

import gen.tools.Widgets;

import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.gson.Gson;

public class QueryFileCandidates extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    public QueryFileCandidates() {
        super();
    }

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request,response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		final Widgets wid = new Widgets();
		request.setCharacterEncoding( wid.UIcodeSet );
		response.setCharacterEncoding( wid.UIcodeSet );
		response.setContentType("application/json");
		
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		
		ArrayList<String> sts = new ArrayList<String>();
		
		try {
			conn = wid.getConn();
			ps = conn.prepareStatement("SELECT fileName FROM filecandidates");
			rs = ps.executeQuery();
			
			while( rs.next() ) {
				sts.add( rs.getString("fileName") );
			}
			
		} catch ( Exception e) {
			wid.errLog(e);
		} finally {
			try {
				if (rs != null) {rs.close();}
				if (ps!= null) {ps.close();}
				if (conn!= null) {conn.close();}
			} catch (SQLException e) { System.out.println(wid.errProcess(e)); }
		}
		
		response.getWriter().write(new Gson().toJson( sts ));
	}

}
